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Use bit operations to get a locally administered address rather than using a

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hardcoded OUI code.
This commit is contained in:
Andrew Thompson 2006-06-12 22:43:37 +00:00
parent 3b26c608f8
commit 80829fccd7
1 changed files with 4 additions and 5 deletions
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9
sys/net/if_bridge.c
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@ -501,8 +501,8 @@ bridge_clone_create(struct if_clone *ifc, int unit)
ifp->if_hdrlen = ETHER_HDR_LEN;
/*
* Generate a random ethernet address and use the private AC:DE:48
* OUI code.
* Generate a random ethernet address with a locally administered
* address.
*
* Since we are using random ethernet addresses for the bridge, it is
* possible that we might have address collisions, so make sure that
@ -510,9 +510,8 @@ bridge_clone_create(struct if_clone *ifc, int unit)
*/
for (retry = 1; retry != 0;) {
arc4rand(eaddr, ETHER_ADDR_LEN, 1);
eaddr[0] = 0xAC;
eaddr[1] = 0xDE;
eaddr[2] = 0x48;
eaddr[0] &= ~1; /* clear multicast bit */
eaddr[0] |= 2; /* set the LAA bit */
retry = 0;
mtx_lock(&bridge_list_mtx);
LIST_FOREACH(sc2, &bridge_list, sc_list) {